On Controller 2, hold A and B, then press Reset. After pressing Reset,
keep holding the buttons on Controller 2. When you see "Push Start"
flashing on the Title screen, release the buttons for a one round match.
On Controller 2, hold Up, L Button, and R Button and press Reset.
After pressing Reset, keep holding the buttons on Controller 2. Begin
your game with Controller 1, and then release the buttons on
Controller 2 for an extra lifeline.
On Controller 2 press and Hold X, A, and L. Then reset the
game. When the Title Screen appears, release the buttons.
You will have 10 Credits instead of 3.
On Controller 2, hold X and Y and press Reset. After pressing
Reset, keep holding the buttons on Controller 2. When you
see "Push Start" flashing on the Title screen, release the buttons
for a five round match.